Home
Class 14
MATHS
The average age of 120 students in a gro...

The average age of 120 students in a group is 13.56 years, 35% of the number of students are girls and the rest are boys. If the ratio of the average age of boys and girls is 6:5, then what is the average age (in years) of the girls?
एक समूह के 120 छात्रों की औसत उम्र 13.56 वर्ष है | छात्रों में 35% लड़कियाँ हैं तथा शेष लड़के हैं | यदि लड़कों और लड़कियों की औसत उम्र का अनुपात 6 : 5 है, तो लड़कियों की औसत उम्र ( वर्ष में ) कितनी है ?

A

12

B

11.6

C

10

D

14.4

Text Solution

Verified by Experts

Promotional Banner

Topper's Solved these Questions

PINNACLE-AVERAGE-EXERCISE
  1. The average of 33 numbers is 74. The average of the first 17 numbers i...

    Text Solution

    |

  2. The average weight of a certain number of students in a group is 72 kg...

    Text Solution

    |

  3. The average age of 120 students in a group is 13.56 years, 35% of the ...

    Text Solution

    |

  4. The average of 18 numbers is 37.5. If six numbers of average x are add...

    Text Solution

    |

  5. The average of thirteen numbers is 80. The average of the first five n...

    Text Solution

    |

  6. The average of twelve numbers is 46. The average of the first four num...

    Text Solution

    |

  7. The average of eleven numbers is 54. The average of the first four num...

    Text Solution

    |

  8. Three numbers are such that if the average of any two of them is added...

    Text Solution

    |

  9. The average of twelve numbers is 55.5. The average of the first four n...

    Text Solution

    |

  10. The average marks of 50 students in a class was found to be 64. If the...

    Text Solution

    |

  11. The average marks of 45 students was found to be 66. If the marks of t...

    Text Solution

    |

  12. In a class of 50 students, 46% are girls and the remaining are boys. T...

    Text Solution

    |

  13. In a class of 60 students, 40% are girls. The average weight of the bo...

    Text Solution

    |

  14. In a class of 60 students, 40% are girls. The average weight of the wh...

    Text Solution

    |

  15. In a class of 40 students, 60% are girls. The average of the girls’ ma...

    Text Solution

    |

  16. In a class of 50 students, 60% are boys. The average of marks of the b...

    Text Solution

    |

  17. In a class of 50 students, 40% are girls. The average marks of the who...

    Text Solution

    |

  18. There are three numbers. If the average of any two of them is added to...

    Text Solution

    |

  19. There are 90 students in a class, out of which 70% are from village A ...

    Text Solution

    |

  20. In a class of 80 students, 60% participate in games and the rest do no...

    Text Solution

    |